package com.leonzx.base.config.security;

import org.apache.commons.codec.DecoderException;
import org.apache.commons.codec.binary.Base64;
import org.apache.commons.codec.binary.Hex;
import org.apache.commons.lang3.StringEscapeUtils;

import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.net.URLEncoder;

/**
 * Created by liang on 2016/9/22.
 */
public class Encodes {
    private static final String DEFAULT_ENCODING = "UTF-8";
    private static final String DEFAULT_URL_ENCODING = "UTF-8";
    private static final char[] BASE62 = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz".toCharArray();

    /**

     * UTF-8编码

     */
    public static String toString(byte[] bytes) {
        try {
            return new String(bytes, DEFAULT_ENCODING);
        } catch (UnsupportedEncodingException e) {
            throw Exceptions.unchecked(e);
        }
    }
    /**

     * UTF-8解码

     */
    public static byte[] toBytes(String source) {
        try {
            return source.getBytes(DEFAULT_ENCODING);
        } catch (UnsupportedEncodingException e) {
            throw Exceptions.unchecked(e);
        }
    }

    /**

     * Hex编码.

     */
    public static String encodeHex(byte[] input) {
        return Hex.encodeHexString(input);
    }

    /**

     * Hex解码.

     */
    public static byte[] decodeHex(String input) {
        try {
            return Hex.decodeHex(input.toCharArray());
        } catch (DecoderException e) {
            throw Exceptions.unchecked(e);
        }
    }

    /**

     * Base64编码.

     */
    public static String encodeBase64(byte[] input) {
        return Base64.encodeBase64String(input);
    }

    /**

     * Base64编码, URL安全(将Base64中的URL非法字符'+'和'/'转为'-'和'_', 见RFC3548).

     */
    public static String encodeUrlSafeBase64(byte[] input) {
        return Base64.encodeBase64URLSafeString(input);
    }

    /**

     * Base64解码.

     */
    public static byte[] decodeBase64(String input) {
        return Base64.decodeBase64(input);
    }

    /**

     * Base62编码。

     */
    public static String encodeBase62(byte[] input) {
        char[] chars = new char[input.length];
        for (int i = 0; i < input.length; i++) {
            chars[i] = BASE62[(input[i] & 0xFF) % BASE62.length];
        }
        return new String(chars);
    }

    /**

     * Html 转码.

     */
    public static String escapeHtml(String html) {
        return StringEscapeUtils.escapeHtml4(html);
    }

    /**

     * Html 解码.

     */
    public static String unescapeHtml(String htmlEscaped) {
        return StringEscapeUtils.unescapeHtml4(htmlEscaped);
    }

    /**

     * Xml 转码.

     */
    @SuppressWarnings("deprecation")
    public static String escapeXml(String xml) {
        return StringEscapeUtils.escapeXml(xml);
    }

    /**

     * Xml 解码.

     */
    public static String unescapeXml(String xmlEscaped) {
        return StringEscapeUtils.unescapeXml(xmlEscaped);
    }

    /**

     * URL 编码, Encode默认为UTF-8.

     */
    public static String urlEncode(String part) {
        try {
            return URLEncoder.encode(part, DEFAULT_URL_ENCODING);
        } catch (UnsupportedEncodingException e) {
            throw Exceptions.unchecked(e);
        }
    }

    /**

     * URL 解码, Encode默认为UTF-8.

     */
    public static String urlDecode(String part) {

        try {
            return URLDecoder.decode(part, DEFAULT_URL_ENCODING);
        } catch (UnsupportedEncodingException e) {
            throw Exceptions.unchecked(e);
        }
    }
}
